Babytwins Study Sweden (BATSS)

Gel team members working on the project: Professor Angelica Ronald

Lead collaborator: Dr Terje Falck-Ytter

Funded by: The Riksbankens Jubileumsfond –  The Swedish Foundation for Humanities and Social Sciences

The Project: The Babytwins Study Sweden project aims to study the contribution of genetic and environment influences to individual differences in traits in early infancy.  Eye tracking, electroencephalogram (EEG), parent-child interaction and questionnaires are being employed in order to understand more about the etiology of a wide variety of cognitive processes and behaviours such as social and non-social aspects of attention.

The longitudinal design allows us to combine the twin design with a developmental perspective from 5 months up to early childhood.  The Babytwins Study Sweden places a special focus on phenotypes that are potential early signs of ASD, aiming to study the influence of genetic and environmental factors to individual differences in infancy and across early development.


Falck-Ytter, T., Hamrefors, L., Sanchez, M.S., Portugal, A.M., Taylor, M.J., Li, D., Viktorsson, C., Hardiansyah, I., Myers, L., Westberg, L., Bölte, S.,  Tammimies, K., and Ronald, A. (2021). The Babytwins Study Sweden (BATSS): A multi-method infant twin study of genetic and environmental factors influencing infant brain and behavioral development. Twin Research and Human Genetics, ISSN 1832-4274. (In Press)